INTERNATIONAL STANDARD NORME INTERNATIONALE

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(1)IEC 61249-2-45. ®. Edition 1.0 2018-01. INTERNATIONAL STANDARD NORME INTERNATIONALE. Materials for printed boards and other interconnecting structures – Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of thermal conductivity 1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for IEC 61249-2-45:2018 lead-free assembly https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3be90e0c3258e/iec-61249-2-45-2018 Matériaux pour circuits imprimés et autres structures d'interconnexion – Partie 2-45: Matériaux de base renforcés, plaqués et non plaqués – Feuilles stratifiées renforcées en verre de type E tissé/non tissé époxyde non halogéné, de conductivité thermique 1,0 W/(m•K) et d'inflammabilité définie (essai de combustion verticale), plaquées cuivre pour les assemblages sans plomb. IEC 61249-2-45:2018-01(en-fr). iTeh STANDARD PREVIEW (standards.iteh.ai).

(2) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright © 2018 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence. IEC Central Office 3, rue de Varembé CH-1211 Geneva 20 Switzerland. Tel.: +41 22 919 02 11 info@iec.ch www.iec.ch. About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IEC publications search - webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,…). It also gives information on projects, replaced and withdrawn publications.. Electropedia - www.electropedia.org The world's leading online dictionary on electrotechnology, containing more than 22 000 terminological entries in English and French, with equivalent terms in 16 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online.. iTeh STANDARD PREVIEW (standards.iteh.ai). IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and IEC 61249-2-45:2018 once a month by email. French extracted from the Terms and Definitions clause of https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3IEC publications issued since 2002. Some entries have been be90e0c3258e/iec-61249-2-45-2018 IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and If you wish to give us your feedback on this publication or CISPR. need further assistance, please contact the Customer Service Centre: sales@iec.ch. A propos de l'IEC La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées. A propos des publications IEC Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la plus récente, un corrigendum ou amendement peut avoir été publié. Recherche de publications IEC webstore.iec.ch/advsearchform La recherche avancée permet de trouver des publications IEC en utilisant différents critères (numéro de référence, texte, comité d’études,…). Elle donne aussi des informations sur les projets et les publications remplacées ou retirées.. Electropedia - www.electropedia.org Le premier dictionnaire d'électrotechnologie en ligne au monde, avec plus de 22 000 articles terminologiques en anglais et en français, ainsi que les termes équivalents dans 16 langues additionnelles. Egalement appelé Vocabulaire Electrotechnique International (IEV) en ligne.. IEC Just Published - webstore.iec.ch/justpublished Restez informé sur les nouvelles publications IEC. Just Published détaille les nouvelles publications parues. Disponible en ligne et une fois par mois par email.. Glossaire IEC - std.iec.ch/glossary 67 000 entrées terminologiques électrotechniques, en anglais et en français, extraites des articles Termes et Définitions des publications IEC parues depuis 2002. Plus certaines entrées antérieures extraites des publications des CE 37, 77, 86 et CISPR de l'IEC.. Service Clients - webstore.iec.ch/csc Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: sales@iec.ch..

(3) IEC 61249-2-45. ®. Edition 1.0 2018-01. INTERNATIONAL STANDARD NORME INTERNATIONALE. iTeh STANDARD PREVIEW (standards.iteh.ai). Materials for printed boards and other interconnecting structures – Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of thermal conductivity 1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for IEC 61249-2-45:2018 lead-free assembly https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3be90e0c3258e/iec-61249-2-45-2018 Matériaux pour circuits imprimés et autres structures d'interconnexion – Partie 2-45: Matériaux de base renforcés, plaqués et non plaqués – Feuilles stratifiées renforcées en verre de type E tissé/non tissé époxyde non halogéné, de conductivité thermique 1,0 W/(m•K) et d'inflammabilité définie (essai de combustion verticale), plaquées cuivre pour les assemblages sans plomb. INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE. ICS 31.180. ISBN 978-2-8322-9095-8. Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé. ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale.

(4) –2–. IEC 61249-2-45:2018 © IEC 2018. CONTENTS FOREWORD ........................................................................................................................... 4 1. Scope .............................................................................................................................. 6. 2. Normative references ...................................................................................................... 6. 3. Terms and definitions ...................................................................................................... 6. 4. Materials and construction ............................................................................................... 6. 4.1 General ................................................................................................................... 6 4.2 Resin system .......................................................................................................... 7 4.3 Metal foil ................................................................................................................. 7 4.4 Reinforcement ........................................................................................................ 7 5 Electrical properties ......................................................................................................... 7 6. Non-electrical properties of the copper-clad laminate ...................................................... 7. 6.1 Appearance of the copper-clad sheet ...................................................................... 7 6.1.1 General ........................................................................................................... 7 6.1.2 Indentations (pits and dents) ........................................................................... 8 6.1.3 Wrinkles .......................................................................................................... 8 6.1.4 Scratches ........................................................................................................ 8 6.1.5 Raised areas ................................................................................................... 8 6.2 Appearance of the unclad face ................................................................................ 9 6.3 Laminate thickness ................................................................................................. 9 6.4 Bow and twist ......................................................................................................... 9 6.5 Properties related to the copper foil bond .............................................................. 10 IEC 61249-2-45:2018 6.6 Punching and machining ....................................................................................... 11 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f36.7 Dimensional stability ............................................................................................. 11 be90e0c3258e/iec-61249-2-45-2018 6.8 Sheet sizes ........................................................................................................... 11 6.8.1 Typical sheet sizes ........................................................................................ 11 6.8.2 Tolerances for sheet sizes ............................................................................. 11 6.9 Cut panels ............................................................................................................ 12 6.9.1 Cut panel sizes .............................................................................................. 12 6.9.2 Size tolerances for cut panels ........................................................................ 12 6.9.3 Rectangularity of cut panels .......................................................................... 12 6.10 Thermal conductivity ............................................................................................. 12 7 Non-electrical properties of the base material after complete removal of the copper foil ..................................................................................................................... 13. iTeh STANDARD PREVIEW (standards.iteh.ai). 7.1 Appearance of the dielectric base material ............................................................ 13 7.2 Flexural strength ................................................................................................... 13 7.3 Flammability ......................................................................................................... 13 7.4 Water absorption .................................................................................................. 14 7.5 Measling ............................................................................................................... 14 7.6 Glass transition temperature and cure factor ......................................................... 15 7.7 Decomposition temperature .................................................................................. 15 7.8 Time to delamination (TMA) .................................................................................. 15 7.9 Halogen content .................................................................................................... 15 8 Quality assurance .......................................................................................................... 16 8.1 8.2 8.3. Quality system ...................................................................................................... 16 Responsibility for inspection ................................................................................. 16 Qualification inspection ......................................................................................... 16.

(5) IEC 61249-2-45:2018 © IEC 2018. –3–. 8.4 Quality conformance inspection ............................................................................ 16 8.5 Certificate of conformance .................................................................................... 16 8.6 Safety data sheet .................................................................................................. 16 9 Packaging and marking ................................................................................................. 16 10. Ordering information ...................................................................................................... 17. Annex A (informative) Engineering information .................................................................... 18 A.1 A.2 A.3 A.4 A.5 A.6 A.7 Annex B. General ................................................................................................................. 18 Chemical properties .............................................................................................. 18 Electrical properties .............................................................................................. 18 Flammability properties ......................................................................................... 18 Mechanical properties ........................................................................................... 18 Physical properties ............................................................................................... 18 Thermal properties ................................................................................................ 19 (informative) Common laminate constructions ........................................................ 20. Annex C (informative) Guideline for qualification and conformance inspection ..................... 21 Bibliography .......................................................................................................................... 22 Table 1 – Electrical properties ................................................................................................ 7 Table 2 – Size of indentations ................................................................................................. 8. iTeh STANDARD PREVIEW Table 4 – Bow and twist requirements ................................................................................... 10 (standards.iteh.ai). Table 3 – Nominal thickness and tolerance of metal-clad laminate .......................................... 9 Table 5 – Pull-off and peel strength requirements ................................................................. 10. IEC 61249-2-45:2018 Table 6 – Dimensional stability ............................................................................................. 11 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3be90e0c3258e/iec-61249-2-45-2018. Table 7 – Size tolerances for cut panels ............................................................................... 12 Table 8 – Rectangularity of cut panels .................................................................................. 12 Table 9 – Thermal conductivity ............................................................................................. 12 Table 10 – Flexural strength requirements ............................................................................ 13 Table 11 – Flammability requirements ................................................................................... 14 Table 12 – Water absorption requirements ............................................................................ 14 Table 13 – Measling requirements ........................................................................................ 14 Table 14 – Glass transition temperature and cure factor requirements .................................. 15 Table 15 – Decomposition temperature requirements............................................................ 15 Table 16 – Time to delamination requirements ...................................................................... 15 Table 17 – Halogen content .................................................................................................. 15 Table C.1 – Qualification and conformance inspection .......................................................... 21.

(6) –4–. IEC 61249-2-45:2018 © IEC 2018. INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________. MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES – Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of thermal conductivity 1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for lead-free assembly FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.. iTeh STANDARD PREVIEW (standards.iteh.ai). 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC IEC 61249-2-45:2018 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3misinterpretation by any end user.. be90e0c3258e/iec-61249-2-45-2018. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.. International Standard IEC 61249-2-45 has been prepared by IEC technical committee 91: Electronics assembly technology. The text of this International Standard is based on the following documents: CDV. Report on voting. 91/1447/CDV. 91/1483/RVC. Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table..

(7) IEC 61249-2-45:2018 © IEC 2018. –5–. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 61249 series, under the general title Materials for printed boards and other interconnecting structures, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific document. At this date, the document will be •. reconfirmed,. •. withdrawn,. •. replaced by a revised edition, or. •. amended.. iTeh STANDARD PREVIEW (standards.iteh.ai) IEC 61249-2-45:2018 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3be90e0c3258e/iec-61249-2-45-2018.

(8) –6–. IEC 61249-2-45:2018 © IEC 2018. MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES – Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of thermal conductivity 1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for lead-free assembly. 1. Scope. This part of IEC 61249 gives requirements for properties of non-halogenated epoxide non-woven reinforced core/woven E-glass reinforced surface laminate sheets of thermal conductivity and defined flammability (vertical burning test), copper-clad for lead-free assembly in thicknesses of 0,60 mm up to 1,70 mm. The flammability rating is achieved through the use of non-halogenated fire retardants reacted as part of the epoxide polymeric structure. The glass transition temperature is defined to be 105 °C minimum. Thermal conductivity is defined to be (1,0 ± 0,15) W/(m•K).. 2. Normative references. iTeh STANDARD PREVIEW (standards.iteh.ai). The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61249-2-45:2018. https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3-. be90e0c3258e/iec-61249-2-45-2018 IEC 61189-2:2006, Test methods for electrical materials, printed boards and other interconnection structures and assemblies – Part 2: Test methods for materials for interconnection structures IEC 61249-5-1, Materials for interconnection structures – Part 5: Sectional specification set for conductive foils and films with and without coatings – Section 1: Copper foils (for the manufacture of copper-clad base materials) IEC/PAS 61249-6-3, Specification for finished fabric woven from "E" glass for printed boards ISO 11014, Safety data sheet for chemical products – Content and order of sections. 3. Terms and definitions. No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: •. IEC Electropedia: available at http://www.electropedia.org/. •. ISO Online browsing platform: available at http://www.iso.org/obp. 4. Materials and construction. 4.1. General. The sheet consists of an insulating base with metal foil bonded to one side or both..

(9) IEC 61249-2-45:2018 © IEC 2018 4.2. –7–. Resin system. Non-halogenated epoxide, filled, resulting in a laminate with a glass transition temperature of 105 °C minimum. Contrast agents may be added to enhance processing such as automated optical inspection (AOI). Its flame resistance is defined in terms of the flammability requirements of 7.3. 4.3. Metal foil. Copper as specified in IEC 61249-5-1, copper foil (for the manufacture of copper-clad materials). The preferred foils are electrodeposited of defined ductility. 4.4. Reinforcement. Woven E-glass as specified in IEC/PAS 61249-6-3, woven E-glass fabric (for the manufacture of prepreg and copper-clad material) as the surface sheet on each side of a core reinforcement comprised of non-woven E-glass mat.. 5. Electrical properties. The electrical property requirements are shown in Table 1.. iTeh STANDARD PREVIEW Table 1 – Electrical properties (standards.iteh.ai). method IECTest 61249-2-45:2018 Requirements IEC 61189-2 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3Surface resistance after damp heat 2E04 be90e0c3258e/iec-61249-2-45-2018 ≥5 000 MΩ Property. while in the humidity chamber. Surface resistance after damp heat and recovery (optional). 2E04. ≥40 000 MΩ. Volume resistivity after damp heat while in the humidity chamber. 2E04. ≥5 000 MΩm. Volume resistivity after damp heat and recovery (optional). 2E04. ≥10 000 MΩm. Relative permittivity after damp heat and recovery (1 MHz). 2E10. ≤5,4. Dissipation factor after damp heat and recovery (1 MHz). 2E10. ≤0,040. Arc resistance. 2E14. ≥60 s. Dielectric breakdown. 2E15. ≥40 kV. Surface resistance at 125 °C. 2E04. ≥1 000 MΩ. Volume resistivity at 125 °C. 2E04. ≥1 00 MΩm. 6. Non-electrical properties of the copper-clad laminate. 6.1 6.1.1. Appearance of the copper-clad sheet General. The copper-clad face shall be substantially free from defects that can have an impact on the material’s fitness for use for the intended purpose..

(10) –8–. IEC 61249-2-45:2018 © IEC 2018. For the defects given in 6.1.2 to 6.1.5, the requirements given shall apply when inspection is made in accordance with IEC 61189-2, method 2M18. 6.1.2. Indentations (pits and dents). The size of an indentation, usually the length, shall be determined and given a point value to be used as a measure of the quality as indicated in Table 2. Table 2 – Size of indentations Size mm. Point value for each indentation. 0,13 to 0,25. 1. 0,26 to 0,50. 2. 0,51 to 0,75. 4. 0,76 to 1,00. 7. Over 1,00. 30. The total point count for any 300 mm × 300 mm area shall be calculated to determine the class of the material. •. Class A. 29 maximum. •. Class B. 17 maximum. •. Class C. iTeh STANDARD PREVIEW (standards.iteh.ai) 5 maximum. •. Class D. 0. •. Class X. To behttps://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3agreed upon by user and supplier. IEC 61249-2-45:2018. be90e0c3258e/iec-61249-2-45-2018. The required class of material shall be specified in the purchase order. Class A applies unless otherwise specified. 6.1.3. Wrinkles. There shall be no wrinkles in the copper surface. The inspection area shall exclude a 13 mm border from the edge of the panel or sheet. 6.1.4. Scratches. Scratches deeper than 10 µm or 20 % of the nominal thickness of the foil thickness, whichever is lower, are not permitted. Scratches with a depth of less than 5 % of the nominal thickness of the foil shall not be counted unless this depth is 10 µm or more. Scratches with a depth of between 5 % and 20 % of the nominal thickness of the foil are permitted to a total length of 100 mm for a 300 mm × 300 mm area. The inspection area shall exclude a 13 mm border from the edge of the panel or sheet. 6.1.5. Raised areas. Raised areas are usually impressions in the press plates used during manufacture but may also be caused by blisters or inclusions of foreign particles under the foil..

(11) IEC 61249-2-45:2018 © IEC 2018. –9–. Raised areas caused by blisters or inclusions are not permitted. Raised areas being impressions of defects in press plates are permitted to the following extent: –. Class A and X material. maximum height 15 µm and maximum length 15 mm;. –. Class B and C material. maximum height 8 µm and maximum length 15 mm;. –. Class D material. maximum height 5 µm and maximum length 15 mm.. 6.2. Appearance of the unclad face. The unclad face of single side clad sheet shall have the natural appearance resulting from the curing process. Small irregularities in colour are permitted. The gloss of the unclad face shall be that given by the press plate, release film, or release foil used. Variations of gloss due to the impact of the pressure of gases released during the curing are permitted. 6.3. Laminate thickness. If the copper-clad laminate is tested in accordance with test method 2D01 of IEC 61189-2, the thickness shall not depart from the nominal thickness by more than the appropriate value shown in Table 3. The fine tolerances shall apply unless the other tolerances are ordered. Table 3 – Nominal thickness and tolerance of metal-clad laminate Property. Thickness. iTeh STANDARD PREVIEW (standards.iteh.ai). Test method IEC 61189-2 2D01. Nominal thickness including metal foil mm ≥0,60 <0,80. Tolerance requirement ± mm. Coarse. Fine. Extra fine. 0,08. 0,06. 0,05. IEC 61249-2-45:2018 0,17 0,10 ≥0,80 <1,00 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f30,19 0,13 ≥1,00 ≤1,70 be90e0c3258e/iec-61249-2-45-2018. 0,08 0,08. The thickness and tolerances do not apply to the outer 25 mm of the trimmed master sheet or the outer 13 mm of the cut-to-size panel as manufactured and delivered by the supplier. At no point shall the thickness vary from the nominal by a value greater than 125 % of the specified tolerance. 6.4. Bow and twist. When the copper-clad laminate is tested in accordance with test method 2M01 of IEC 61189-2, the bow and twist shall not exceed the values given in Table 4..

(12) – 10 –. IEC 61249-2-45:2018 © IEC 2018. Table 4 – Bow and twist requirements Property. Test method IEC 61189-2. Bow and twist. Panel dimension longest side mm. Nominal thickness mm. Copper foil on one side. Copper foil on both sides. ≤350. ≤2,5. ≤2,0. >350 ≤500. ≤2,3. ≤1,8. >500. ≤2,0. ≤1,5. ≤350. ≤2,0. ≤1,5. >350 ≤500. ≤1,8. ≤1,3. >500. ≤1,5. ≤1,0. 2M01 ≥0,6 ≤1,3. >1,3 ≤1,7. Requirements %. The requirements for bow and twist apply only to one sided copper-clad laminates with maximum foil thickness of 105 µm (915 g/m 2 ) and double sided copper-clad laminates with maximum foil thickness difference of 70 µm (610 g/m 2 ). Requirements for laminates with copper foil configurations beyond these limits should be subject to agreement between purchaser and supplier.. 6.5. Properties related to the copper foil bond. Pull-off and peel strength requirements are shown in Table 5. These requirements apply to copper foil with a normal profile depth.. iTeh STANDARD PREVIEW (standards.iteh.ai) Table 5 – Pull-off and peel strength requirements. Property Pull-off strength. Test method IEC 61249-2-45:2018 Requirement IEC 61189-2 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f32M05 be90e0c3258e/iec-61249-2-45-2018 ≥25 N Thickness of the copper foil 18 µm (152. Peel strength after heat shock 288 °C, 20 s. 2M14. Peel strength after dry heat 125 °C. 2M15. Peel strength after exposure to solvent vapour. Solvents as agreed upon between purchaser and supplier. 2M06. Peel strength after simulated plating. 2M16. Peel strength at high temperature. 2M17. ≥35 µm. g/m 2 ). (610 g/m 2 ). ≥1,0 N/mm. ≥1,2 N/mm. (305. ≥0,8 N/mm. ≥70 µm. g/m 2 ). No blistering or delamination Under consideration. Under consideration. Under consideration. No blistering or delamination ≥0,8 N/mm. ≥1,0 N/mm. ≥1,2 N/mm. No blistering or delamination Under consideration. Under consideration. Under consideration. No blistering or delamination ≥0,6 N/mm. ≥0,7 N/mm. ≥0,9 N/mm. Temperature 125 °C (optional) Blistering after 288 °C, 20 s heat shock. 2C05. No blistering or delamination. In case of difficulty due to breakage of the foil or reading range of the force measuring device, the measurement of peel strength at high temperature may be carried out using conductor widths of more than 3 mm..

(13) IEC 61249-2-45:2018 © IEC 2018 6.6. – 11 –. Punching and machining. The laminate shall, in accordance with the manufacturer's recommendations, be capable of being punched, sheared or drilled. Delamination at the edges due to the shearing process is permissible, provided that the depth of delamination is not larger than the thickness of the base material. Delamination at the edges of drilled holes due to the drilling process is not permissible. Drilled holes shall be capable of being through-plated with no interference from any exudations into the hole. A suitable test method for evaluating punching is 2M19 of IEC 61189-2. Requirements for punching force and pull-out force are matters for agreement between user and supplier. 6.7. Dimensional stability. When specimens are tested in accordance with IEC 61189-2, 2X02, the observed tolerance shall be as specified in Table 6. The nominal dimensional stability value shall be as agreed upon between the user and the vendor. The tolerance range around the agreed upon nominal range shall be range B unless otherwise specified on the purchase order. Table 6 – Dimensional stability Property Dimensional stability. Test method IEC 61189-2. Class. Requirement μm/m. 2X02. A. ±600. iTeh STANDARD PREVIEW (standards.iteh.ai) B. ±400. C. ±200. X. As agreed upon between user and supplier. IEC 61249-2-45:2018 https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3be90e0c3258e/iec-61249-2-45-2018 The choice of the glass fabrics and cellulose papers in the construction of the laminate has a. significant impact on dimensional stability. Examples of typical constructions used in printed board applications can be found in Annex B. Annex B is not a construction requirement table but is presented for engineering information only. 6.8. Sheet sizes. 6.8.1. Typical sheet sizes. Sheet sizes are matters of agreement between purchaser and supplier. However, the recommended sizes are listed below: –. 915 mm × 1 220 mm;. –. 1 020 mm × 1 220 mm;. –. 1 070 mm × 1 220 mm;. –. 1 065 mm × 1 155 mm;. –. 1 065 mm × 1 280 mm;. –. 1 000 mm × 1 000 mm;. –. 1 000 mm × 1 200 mm.. 6.8.2. Tolerances for sheet sizes. 25 The size of the sheet delivered by the supplier shall not deviate by more than + − 0 mm from the ordered size..

(14) – 12 – 6.9. IEC 61249-2-45:2018 © IEC 2018. Cut panels. 6.9.1. Cut panel sizes. Cut panel sizes shall be, when delivered, in accordance with the purchaser’s specification. 6.9.2. Size tolerances for cut panels. For panels cut to size according to the purchaser's specification, the tolerances for length and width shall apply as shown in Table 7. Tolerances indicated as "normal" shall be in effect unless otherwise specified by in the purchasing specification. Table 7 – Size tolerances for cut panels Tolerance requirement ± mm. Panel size mm. NOTE. 6.9.3. Normal. Close. ≤300. 2,0. 0,5. >300 ≤600. 2,0. 0,8. >600. 2,0. 1,6. The specified tolerances include all deviations caused by cutting the panels.. iTeh STANDARD PREVIEW size according to the purchaser’s specification, the (standards.iteh.ai). Rectangularity of cut panels. For panels cut to requirements for rectangularity shall apply as shown in Table 8. Tolerance indicated as "normal" shall be in effect unless otherwise specified in theIEC purchasing specification. 61249-2-45:2018. https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3Tablebe90e0c3258e/iec-61249-2-45-2018 8 – Rectangularity of cut panels Property Rectangularity of cut panels. 6.10. Requirement mm/m. Test method IEC 61189-2. Normal. Close. ≤3. ≤2. 2M23. Thermal conductivity. The thermal conductivity shall meet the requirement in Table 9. Table 9 – Thermal conductivity Property Thermal conductivity a. Test method 2XXX a. Under consideration (steady-state heat flow method).. Nominal Value. Tolerance. W/(m•K). W/(m•K). 1,0. ±0,15.

(15) IEC 61249-2-45:2018 © IEC 2018. 7. – 13 –. Non-electrical properties of the base material after complete removal of the copper foil. 7.1. Appearance of the dielectric base material. The etched specimens shall be inspected to verify that no surface or subsurface imperfections of the dielectric material exceed those shown below. The panels shall be inspected using an optical aid apparatus which provides a minimum magnification of 4×. Referee inspection shall be conducted at 10× magnification. Lighting conditions of inspection shall be appropriate to the material under inspection or as agreed upon between user and supplier. Surface and subsurface imperfections (such as weave texture, resin starvation, voids, foreign inclusions) shall be acceptable provided that the imperfections meet the following: •. the reinforcement fibres are not cut or exposed;. •. the foreign inclusions are not conductive;. •. metallic inclusions are not acceptable;. •. the imperfections do not propagate as a result of thermal stress;. •. the foreign inclusions are translucent;. •. opaque foreign fibres are less than 15 mm in length and average no more than 1,0 per 300 mm × 300 mm area;. iTeh STANDARD PREVIEW opaque foreign inclusions other than fibres shall not exceed 0,50 mm. Opaque foreign (standards.iteh.ai) inclusions less than 0,15 mm shall not be counted. Opaque foreign inclusions between. •. 0,50 mm and 0,15 mm shall average no more than two spots per 300 mm × 300 mm area;. IEC 61249-2-45:2018. voids (sealed voids or surface void) have a longest dimension less than 0,075 mm and https://standards.iteh.ai/catalog/standards/sist/7823ad5b-eff8-4e63-a4f3there shall not be more than three voids in a 3,5-mm diameter circle. be90e0c3258e/iec-61249-2-45-2018. • 7.2. Flexural strength. When the laminate is tested in accordance with test method 2M20 of IEC 61189-2, the flexural strength shall be as shown in Table 10. Table 10 – Flexural strength requirements Property Flexural strength. Test method IEC 61189-2. Requirements. 2M20. Length direction. ≥250 N/mm 2. Cross direction. ≥150 N/mm 2. (applicable to sheets ≥0,80 mm – 1,70 mm in thickness) Flexural strength at elevated temperature Length direction. Not specified. (applicable to sheets ≥0,80 mm – 1,70 mm in thickness). 7.3. Flammability. When the laminate is tested in accordance with test method 2C06 of IEC 61189-2, the flammability shall be as shown in Table 11..

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